Pump



Se t. 9., 1924.

k s. HIINDS PUMP Filed Jan. 28. 1921 Phlentedsept. 9, 1 924.

UNITED STATES PATENT OFFICE.

snniijwconnmns, or cnrcaco, iLLINoIs, ASSIGNOR r ST. LOUIS rumr a; mu1r-' 1mm COMPANY, or .s'r. LOUIS, mssoum, A conrona'nox or MISSOURI:

PUMP.

Application filed January 28, 1921. Serial No; 440,797.

a v This invention relates to mechanical apparatus, and with regard to certain more.

i which will be indicated in the following specificfeatures, to liquid-handling devices.

1 Among the several objects of the invention may be noted the provision of a simple and durable pump for liquids such as oilor gasoline; the provision of compact and accurate apparatus to determine the quantity of liqui passing therethrough; and the provision of a measuring pump of few parts, not liable to derangement during severe service conditions, and easilydisassembled for inspection or repair. Other objects will be in part obvious and in part pointed out hereinafter. r

The invention accordingly comprises the features of construction, combinations of elements, and arrangements .of parts, which are exemplified in the vconstruction hereinafter described and a scope of the application of claims. 1 a

In the accompanying, drawings, in which are shown one or more possible embodiments of this invention, p

, 1 is a front elevation; and

F1 2'is a transverse vertical section on the l1ne2-2 of Fig. 1; p v n Similar" reference characters indicate the corresponding parts throughout. both views of the drawings.

Referring now to the acompanying drawings,- there is illustrated a base comprising a cylinder lin which is mounted a recipro- .i p g 3 (Fi 2) comprising an 'annu ar crib 5 threa ed upon the. rod 7 and-grooved to. receive a spiral spring 9 that tends to expand radially of the crib,

thereby to. force outwardly against the inner 'wallof the cylinder the annular member 11,,of leather or other flexible material,

' which pirleserves a tight fit between plunger and c der, at least during the upward or. workin stroke. Within the annular crib is threade a sleeve 13 having a spider providedwith a central bearing extending axivalve 17. The latter remains closed during the upward or working stroke, and rises with respect to the crib and sleeve on the downward stroke, thereby acting as a check valve. A ring or washer 19 is located immediately beneath the horizontal part of the flexible member 11 to hold the latter in position, and is itself retained in place a .two castings are held together by means of tension rods 29.

The upper casting 27 is approximately annular, with a horizontal upper surface 31 that is perforated at three places. The central perforation is for the, rod 7 and its bearing 33 (F ig. 2). The front perforation (at the left in Fig. 2) communicates with the ex ansion chamber 35 in the hollow front eg 37 of the bracket or casing or housing 39 that supports, and encloses a number of the elements in the upper part of the apparatus. The rear perforation (at: the right in Fig. 2) communicates withthe discharge chamber 41 in the hollow rear leg 43 of the bracket 39. a

The lower casting 23 has an annular projection 50 provided with a seat for agasket 52, against which a sleeve 54 may; be held by a ring 56. The sleeve is threaded to receive'an inlet pipe 58. v

The bearing 33 above mentioned coinprises 'the annular member- 63 recessed toreceive the packing material 65, which can be kept tight b means of'a, gland 67 se cured in place y a cap 69. threaded upon 1 the outer surface of the annular member 63.

the atmosphere." This is particularly advantageous where gasoline or similar. volatile liquid is used, as any such liquid that escapes through the packing evaporates without forming an explosive mixture.

The bracket 39 serves a number of purposes. Its hollow rear leg 43 (at the right in Fig. 2) provides a discharge passage 41 communicating with a passage 71 (Fig. 2) extending upwardly and terminating in a threaded socket 73 for the reception of a plug 76 which may be re laced by a discharge ipe (not shown) i? desired, in lieu of the discharge pipe 75 and terminal 77. A second feature of the bracket is the expansion chamber 35 above referred to, in the front leg 37 (at the left in Fig. 2). A third feature is the bearing 79 (Fig. 1) in the '-upper portion of the bracket, for the shaft -81 on which the pinion 83 (Fig. 2) and handle 85 are secured. A fourth feature is the open air-space around the plunger-rod bearing 33, above referred to. fifth feature is the rectangular aperture 87 in the top of the bracket, to'guide the vertically reciprocating rack 89 that is secured at its lower end (Fig. 2) to the plunger. rod 7. A sixth feature is the front aperture to which is affixed the front plate 91 carrying the independentlyadjustable quantity stos that limit the upward movement of the rac Three sets of stops are illustrated, the upper one 93 (Fig. 2) corresponding to the rated capacity of the pump, in this instance one gallon, and the middle and lower stops 'correspondin to convenient fractions of such capacity, in this instance two quarts and one quart respectively. A further'feature of the bracket is the horizontalbearing 99 4 in the front face of the bracket (at the left in Fig. 2) for the reception'of the lock 101.

The upper quantity stop 93 (Fig. 2) comprises a screw 103 threaded upon a bracket 105 extending rearwardly from and integral with the front plate 91. A locking device such as the nut 107 is provided so that the screw 103 can be secured in place b the municipal or other ofiicial in charge 0 testing of such apparatus, after he has determmed by experiment just what the position of the screw should be in order that the. pump may deliver its rated capacity, by moving the rack upwardlyfrom its lowermost position indicated in Fig. 2 until the lug 109 engages the lower end of the screw, as, indicated by the uppermost dotted lines The middle quantity stop. 95 (Fig. 2)

-- com rises a screw 103 threaded upon a brac et 111 extending from and integral with a vertical sleeve 113 journaled upon a pair of studs or bolts 116 threaded into rackets 117 integral with the front plate 91. In order that the sleeve 113 may be kept at a definite level, and also prevented.

fromaccidental dis' lacement, a compression s ring 119 ishouse in the lower bore in the cove, and tends to force the sleeve upwardly so that its upper surface is alwa s in contact with the lower surface of t e upper bracket 117. This makes it unnecessary to provide any precise amount of clearance between the sleeve and the brackets 117, and

protects the sleeve and its associated parts against accidental displacement. This middle quantity stop 95 is adjustable as to height independently of the upper stop 93. Its engagement or non-engagement with the lug 109 depends on the angular position of the sleeve 113, and this in turn is governed by the position of a quantity handle 121 integral with the sleeve. This quantity handle extends outside the front plate 91 and is correspond to the respective quantity stops,-in this instance 1 qt., 2 t. and 1 gal.

The lower quantity stop 97 ig. 2) comprises ascrew 103 threaded upon a bracket 127 extending from and integral with the vertical sleeve 113. The middle bracket 111 and its quantitystop 95 are disposed at an an le with relation to the lower bracket 127 and its quantity stop 97.

The two brackets are so positioned with respect to the quantity handle 121 that when the latter is in it's left-hand position, corresponding to the legend 1 qt., the lower quantity stop 97 extends in a rearward direction soas to engage the lug 109 and stop the upward movement of the rack at the height (the lower dotted lines in Fig. 2)

corresponding to a discharge of one quart of liquid from the apparatus. The middle quantity stop is at this time to the right of the rearward position.

' When the quantity handle 121 isin its right-hand position, corresponding to the legend 2 qt., the middle quantity stop 95 extends in a directly rearward direction so as to engage the lug 109 and stop the up ward movement of the rack at the height the upward movement ofthe rack.

7 When the quantity handle 121 is in its middle osition, corresponding to the legend '1 'gaL, t e middlequantity stop 95 is to the right of the rearwardposition and the lower quantity stop'97 is to the left of the rearward position, so that neitherof them engages the lug-109'or stops the upward movement ofthe rack. The rack thus can be moved upward through its full stroke, until quantity pat the discharge of one gallon of liquid from the apparatus.

It is obvious that more or less than two intermediate fractional uantity stops may of the lock-nuts 107, the front plate is applied to the bracket, is secured thereto by screws 129, and then is sealed. in position by suitable means such as conventionally at 131. Y

The lock. 101, above mentioned, normall prevents the raising of the rack. The lock when in its lowermost or normal position as indicated in Fi 2, the projection 139 at the rear of the s idingbarrel 141 engages the lug 109 on the rack and prevents the rack from being raised from such position.

In order to raise the rack, the o erator first inserts a key (not shown) in the ke i101]: 143 (Fig. 1) in. the rotating part of t e tumblers, which are not shown in detail as they form no feature per se of the present invention. The key is then turned clockwise (Fig. 1 from the locked position to the unlocke pull thebarrel bodily toward the operator, that is. toward the left in Fig. 2, to pull the proii1ection139 from the barrel out of the of movement of the lug 109 on the rack, so that the operator can now raise the rackbyv turning the operatin handle 85' in a clockwise direction (Fig. 2

As soon as the barrel has been pulled toward the o erator to unlock the rack, the operator if e so wishes can return the key to its'initial position and withdraw it from the keyhole. When the operator has finished using the apparatus he simply pushes the lock barrel in until the bolt snaps into position, whereupon the lock'is in its orig- Inal condition. 1

The lock is thus at a convenient height.

and in a convenient position at the front of the apparatus, and by its operation directly u on an element integral with the rack it e ectively prevents any unauthorized move- The apparatus is substantially water-.

proof: The cap 133 secured to the top of the rack covers the rectangular aperture- 87 in the top" of the bracket, through which are illustrated The insertion of the key operates theposition. It ,is now possible to the rack passes. The apron 123 above mentioned covers the aperture in the front plate provided for the quantity'handle. The lock 101 is normally flush with the outer surface of the bracket and is exposed only at its keyhole, which may becovered b the swinging plate 135 (Fig. 1) if desire If no lock is used, a disc (not shown) snapped into the bearing 99 to close the aperture. The plunger rod bearing 33 protects the cylinder from moisture from wlthout. And the other parts of the ap aratus that are liable to derangement t rou h moisture or rust are all housed in he bracket. From the above it will be, seen that the several objects of the invention are realized, and other advantageous results attained.

As various possible embodiments m ght be made of the above inventions and various changes might be made in the embodiment above set forth it is to' be understood that all matter herein set forth or shown in the accompanying drawings is to interpreted as illustrative and not in a limiting sense. Claims generic to this application and to my copending a plicatlon Serial No. 440,796, are includ in the "latter application. 1 a v I claim: v 1. In a device of thevcharacter described,

in combination, a pump cylinder having 8.

outlet 1 piston'therein, a valved dischar communicating with said cylm er at a point above said piston, a housing mounted on said cylinder havin hollow legs, said rear eg extend ng upwardly of said front leg to form a discharge or expansion chamber, said rear leg having a transverse extension at its up r ex transtremity and a rack mounted in sai verse extension.-

2. In a device of the character described. in combination, apump cylinder having a piston operative therein, a valved d scharge outlet communicating with and cylinder at a point above said piston, a rack reciprocative with said piston, a hous' mounted on said cylinder having front an rear hollow legs and a transverse. connectm arm, and rear leg extending upwardly 0 said front leg to form a discharge or an expans on chamber, said rear leg having an extension at its upper extremity, and rack and operating means therefor mounted in 831d.- tension.

3. In a device of the character described,

'in combination, a pump cylinder having a piston therein, a valved discha outlet communicating with said cyhn er at a point above said piston, a support mounted on said cylinder, a housing arranged above said support having front andrear aper-- tured legs, and a transverse connecting front and rear 7 7 v L a above said piston, a housing mounted on 1: said front .lg form" om" [h expansion gsaid cylinder having front "and rear hollow chamhr or ar discharge ciindu itn exten legs, said rear leg extending upwardly of "sslon onfthe' 't port said front leg to form a dischar e or ex- 5 air err-and ating" H pansion chamber, said rear leg aving a.

naled insai tnsion',n1eaj1s fo 'fruig transverse extension at its upper extremity 2( said housing upon said supporfi 'ar'id a b'e'ar and a rack mounted in-said transverse exingmounted 'onsaid'support anjd extend tension, and a lock directly engaging the Ming filpi'wardl *bet'ween he'l legs ofsaid' l rack, and normally preventing movement 10 housing." Y v thereof from its normal position.

=4;In-a;dev1ce of thecha acterdescribed-gk In testimony whereof, I have signed my 2j incombination; ump cylindefihaving ra' name to this specification this 26th day of piston ther'ein; valved disehaigyoutlet January, 1921. communicating.withisaidcylinder at a -p'oi SHERWOOD HINDS. 

